Headlight



Patented Oct. 17, 1933 UNITED STATES HEADLIGHT Sigurd Ragnvald Frithiof Bergenson, Stockholm,

Sweden Application October 26, 1931, Serial No. 571,228, and in Sweden November 10, 1930 3 Claims.

The headlights for motor cars and other vehicles in present use all have the drawback that when dimmed the intensity of light is considerably reduced, so that it is diilicult to discern the road surface in front of the car. To overcome this drawback a great many headlights have been constructed provided with screen devices derlecting the light beam downward when the light is to be dimmed, the light beam thus lighting up the road surface in front of the car without dazzling the person coming in the opposite direction. These last mentioned devices, however, have not been practically used, as, owing to the great number of component parts, they have not turned out to be sufliciently durable. Moreover they are diicult to operate and expensive to make.

This invention relates to a device by which the above mentioned drawbacks are remedied as when dimming, the casing and associated reflector are adapted to be turned around a rigid horizontal axis extending through the casing, a source of light being located on the part of the axis inside the casing. In the turned down position the casing will dim part of the rays, but the undimmed part of the rays will be sufcient to illuminate the road surface in front of the car.

An embodiment of the invention is illustrated in the accompanying drawing.

Figure 1 shows a headlight in front View.

Figure 2 illustrates a section being taken on the line II--II of Figure 1 and Figure 3 a section being III-III of Figure 2.

In the present embodiment, the casing 1 with reflector is movably arranged around a rigidly mounted pipe 2, which is bent in such a way that its curvature extends parallel to the curvature of the surface of the reflector, as shown in Figure 3. The source of light 3 is located at the middle of the inwardly bent part of the pipe 2. This pipe is provided with a conventional coupling 5 to permit mounting of `the pipe within the casing.

In dimming the light, the casing 1 is turned into the required position by means of suitably located handles adapted to be operated from the drivers seat.

taken on the line In Figure 2 the casing is shown in a turned down position in dash-and-dot-lines. In order that, in this position of the casing, no rays will be reiiected upon the front part of the car a screen 4 is located behind the casing. As shown in Fig. 2, a designates the angle of reiiection formed by the projected rays in the turned down position of the casing and, of course, this angle is'dependent on the degree to which the casing has been turned down.

` In the illustrated embodiment the source of light 3 comprises an electric bulb, the wires of which run inside the pipe 2 forming the axis of the casing 1.

The turning down of the casing may preferably be effected by an electro-magnet, not shown.

Several modiiications of the device may, of course, be provided within the scope of the invention.V

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A headlight comprising a casing and reflector, a rigidly mounted member extending transversely through the casing and shaped to conform to the curvature thereof, said casing being pivotally mounted on the member, a source of light ixed to the member, and means for swinging the casing vertically upon the member and relatively to the source of light.

2. A headlight as claimed in claim 1 wherein a screen is disposed rearwardly of the casing and xed with the member.

3. A headlight comprising a casing, a horizontally disposed rigidly supported tube extending through the casing and curved to conform to the curvature of the casing, said casing being pivotally connected to the tube along its transverse axis, a light bulb tted centrally on the tube, said casing being swingable in vertical directions on the tube, and conductors mounted in the tube and connected with the light bulb.

SIGURD RAGNVALD FRITHIOF BERGENSON. 

